Vignetting and Field of View with the KAMRA Corneal Inlay
Joint Authors
Langenbucher, Achim
Szentmáry, Nóra
Eppig, Timo
Goebels, Susanne Christiane
Seitz, Berthold
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-11-13
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Purpose.
To evaluate the effect of the KAMRA corneal inlay on the retinal image brightness in the peripheral visual field.
Methods.
A KAMRA inlay was “implanted” into a theoretical eye model in a corneal depth of 200 microns.
Corneal radius was varied to a steep, normal, and flat (7.37, 7.77, and 8.17 mm) version keeping the proportion of anterior to posterior radius constant.
Pupil size was varied from 2.0 to 5.0 mm.
Image brightness was determined for field angles from −70° to 70° with and without KAMRA and proportion of light attenuation was recorded.
Results.
In our parameter space, the attenuation in brightness ranges in between 0 and 60%.
The attenuation in brightness is not affected by corneal shape.
For large field angles where the incident ray bundle is passing through the peripheral cornea, brightness is not affected.
For combinations of small pupil sizes (2.0 and 2.5 mm) and field angles of 20–40°, up to 60% of light may be blocked with the KAMRA.
Conclusion.
For combinations of pupil sizes and field angles, the attenuation of image brightness reaches levels up to 60%.
Our theoretical findings have to be clinically validated with detailed investigation of this vignetting effect.
American Psychological Association (APA)
Langenbucher, Achim& Goebels, Susanne Christiane& Szentmáry, Nóra& Seitz, Berthold& Eppig, Timo. 2013. Vignetting and Field of View with the KAMRA Corneal Inlay. BioMed Research International،Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-1030137
Modern Language Association (MLA)
Langenbucher, Achim…[et al.]. Vignetting and Field of View with the KAMRA Corneal Inlay. BioMed Research International No. 2013 (2013), pp.1-6.
https://search.emarefa.net/detail/BIM-1030137
American Medical Association (AMA)
Langenbucher, Achim& Goebels, Susanne Christiane& Szentmáry, Nóra& Seitz, Berthold& Eppig, Timo. Vignetting and Field of View with the KAMRA Corneal Inlay. BioMed Research International. 2013. Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-1030137
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1030137